JP5517323B2 - Mowing machine - Google Patents

Description

  The present invention relates to an agricultural machine that is attached to a tractor and performs mowing work.

  Japanese Patent Laid-Open No. 60-62904 (Prior Art 1) or Japanese Patent Laid-Open No. 6-253603 (Prior Art 2) is disclosed as a prior art of this type of cutting device.

  Japanese Patent Laid-Open No. 60-62904 (Prior Art 1) states that “a mast frame is attached to a tractor, and the mast frame has an auxiliary support case that moves up and down by protruding from the side of the tractor. For orchards where a management work machine such as a mowing tool, a middle plowing tool, or a drilling tool is detachably provided on the output shaft protruding downward from the output shaft, and the work position of the management work machine is provided variably with respect to the mast frame In the “control machine”, the work height is determined by a three-point link according to the trunk terrain of the fruit tree, the work inclination is determined by the first cylinder 19, and the work position protrusion amount from the tractor is determined by the second cylinders 20 and 20a. “Perform” or “Orchard Management Machine”.

  Japanese Patent Laid-Open No. 6-253603 (Prior Art 2) states that “a cultivator with a support wheel on the side of the traveling vehicle body, the height of which is lower than that of the traveling vehicle body. Disclosure of an orchard cultivator, which is attached via a protrusion adjustment mechanism capable of adjusting the degree of protrusion, and is provided with a plowing depth adjusting mechanism that adjusts the plowing depth of the rotary of the middle plow body. Has been.

JP 60-62904 A (Prior Art 1) JP-A-6-253603 (prior art 2)

  In the case of a mowing work machine that is mounted on a tractor and used, if the posture in the front-rear direction of the mowing unit changes, the mowing height or mowing performance is affected. In order to weed the fields around trees such as orchards without hindrance to the lower branches, it is necessary to offset the mowing unit to the side of the tractor, and the mowing unit is located behind the tractor. In this case, there is a problem in that the grass before cutting is stepped down by the tire of the tractor and there is a problem that the cutting is left behind, so it is necessary to perform the offset work. However, since the mechanism part for offsetting is located on the front side of the cutting work part, the cutting work part is located behind the tractor, and the three-point link mechanism of the tractor easily swings up and down. The posture becomes easy to change.

  For this reason, although there exists a thing like the said prior art 1 or the prior art 2, in the case of the "orchard management machine" of the prior art 1, the working part height can be fixed by the guide member 24, The posture of tilting in the front-rear direction needs to be adjusted and adjusted depending on the vertical position and mounting posture of the three-point link on the tractor side, and there is a problem that requires skill. Further, in the case of the “Orchard cultivator” of the prior art 2, in order to maintain the height and posture of the cultivator body b, support wheels 1 are provided on the front, rear, left and right of the cultivator body b, but cutting is performed with the front wheels. In addition to the problem of stepping over the front grass, there is a problem that the production cost increases due to the wheels and the wheel indicating members.

  For this reason, an object of the present invention is a mowing work machine that can perform work with the working part offset, can easily adjust the posture of the cutting work part, etc., and does not require skill in the work, has a simple structure and is produced An object is to provide a mowing machine with reduced costs.

In order to solve the above-described problems, a mounting unit mounted on a tractor that is a traveling machine body, an offset mechanism unit configured by a parallel link that is provided with a rotation base in the mounting unit and is movable in the left-right direction, and the offset mechanism On the side of the moving part, there is a cutting part with a cutting blade that is rotated by the power from the tractor, and a gauge roller that stabilizes the cutting height behind the cutting part. The mounting portion that is positioned is provided with a lowering restricting means for restricting the lowering position of the mounting portion with one end for preventing the mounting portion from being lowered too much to contact the field scene , capable located below portions of the mounting portion, the contact portion of the field surface consists of a gauge wheel which is constituted by guide shoes or rotating body having a sliding portion which is slidable during work field surface Rukoto Mowing characterized by To propose a work machine.

  Further, the lowering restricting means is provided in the vicinity of the connecting pin of the tractor three-point link mechanism of the mounting portion.

  According to the present invention, the cutting mechanism can be offset to the side of the tractor by the offset mechanism configured by the parallel link movable in the left-right direction, and the grass before cutting is not stepped on by the tire of the tractor. In addition, it is possible to avoid the occurrence of leftovers and to improve cutting performance, and to perform cutting over the entire area from the rear position of the tractor to the maximum offset position to the side, and it is structured by an offset mechanism composed of parallel links. However, it is simple and easy to maintain, and the production cost can be kept low.

  In addition, a gauge roller that stabilizes the cutting height is provided at the rear of the mowing operation part, and the mounting part is provided with a lowering restricting means that regulates the lowered position of the mounting part. The front and rear postures of the mowing operation part provided therebetween are stabilized by the gauge roller at the front part and the forward lowering restricting means, so that the work can be performed without requiring skill.

  Further, since the lowering restricting means is provided in the vicinity of the connecting pin of the tractor three-point link mechanism of the mounting portion, the vertical adjustment of the tractor three-point link mechanism is easy, and the front-rear direction with respect to the gauge roller of the cutting work portion Since the distance can be maximized, the posture of the cutting work unit is stabilized.

The side view of the mowing working machine which implemented this invention. The top view of the state which located the mowing working machine which implemented this invention behind the tractor. The top view of the state which offset the mowing working machine which implemented this invention to the tractor side. The principal part front view of a mowing work part. The principal part side view which cut and cut the cutting work part. The power system explanatory drawing of the mowing working machine which implemented this invention. The side view which showed the attitude | position of the mowing working machine when the descent | fall control means is not provided.

  Embodiments of the present invention will be described below with reference to the following drawings. FIG. 1 is a side view of a mowing work machine according to the present invention, FIG. 2 is a plan view of the mowing work machine located behind the tractor, and FIG. 3 is a state in which the mowing work machine is also offset to the tractor side. FIG. 4 is a front view of the main part of the mowing work part, FIG. 5 is a side view of the main part of the mowing work part, FIG. 6 is an explanatory diagram of the power system of the mowing machine of this example, and FIG. The side view which showed the attitude | position of the mowing working machine when a means is not provided is shown.

  The mowing work machine shown in this example is mounted on a three-point link hitch mechanism provided at the rear of the tractor 1 and is used by driving the mowing work unit 5 with power from the tractor 1. Further, the mowing operation unit 5 is provided so as to be movable to the left and right with respect to the tractor 1 and can be operated on one side of the rear side of the tractor 1. It is possible to carry out forward cutting without stepping on.

  The mowing working machine of this example is provided with a mounting portion 2 for mounting to the tractor 1 at the front portion, and a mowing operation portion 5 is provided behind the mounting portion 2, and the mounting portion 2 and the mowing work portion 5 are offset mechanism portion 6. It is connected through. The offset mechanism unit 6 is configured by a parallel link in a plan view, and the front end of the parallel link is rotatably connected to the mounting unit 2 side, and the rear end side thereof is rotatably connected to the mowing work unit 5 side. Even if it moves to the left or right, the orthogonal posture is not changed with respect to the traveling direction.

  A three-point link hitch mechanism comprising a pair of left and right lower links 11 provided at the rear of the tractor 1 and a top link 10 provided at the upper center thereof is provided at the lower left and right of the mounting portion 2 provided in front of the mowing machine. A lower link pin 20 is connected to the lower link 11 and a top link pin 21 provided on the top of a mast frame 22 formed in a gate shape from the left and right lower link pin 20 portions to connect the top link 10 to the tractor. Attach a mowing machine to 1.

  The mowing working unit 5 is provided with a bevel gear case 3 which is a power input unit provided on one side upper side of the mowing working unit, and an input shaft 30 projecting forward from the bevel gear case 3 and the figure. Power is extracted from the tractor 1 and driven by being connected by a universal joint 12 and a tractor PTO shaft not shown.

  As shown in the explanatory diagram of the power system in FIG. 6, the bevel gear case 3 converts and shifts the power input to the input shaft 30 in the traveling direction left and right by the internal bevel gear 31. The converted power is transmitted from one side of the bevel gear case 3 to the side end of the cutting unit 5 by the horizontal output shaft 32. An output pulley 40 is fixed to the tip of the output shaft on the side end portion side, and further, an input pulley 41 fixed to the end of the rotary shaft 50 of the cutting work unit 5 is provided below the output pulley 40, The power input to the input shaft 30 by the transmission belt 42 stretched around these pulleys is transmitted to the rotary shaft 50 of the cutting work unit 5 and is driven to rotate. The pulley and the transmission belt portion are covered and guarded by a belt cover 4.

  The mowing operation unit 5 is provided with a plurality of mowing blades 51 that can swing freely on a horizontal rotating shaft 50 that is orthogonal to the tractor traveling direction, and passes above the rotating shaft 50 and scoops up from the front to the rear. And weeds are cut and crushed. The upper portion of the outer periphery of the cutting blade 51 rotation trajectory is covered with a cutting portion cover 52 to prevent scattering of cut weeds and the like, and to move some of the cut weeds around the rotation shaft 50 and further It is provided to be crushed finely.

  A gauge roller 7 is provided in the lower rear part of the mowing operation unit 5 to maintain the ground height on the rear side of the mowing operation unit 5. The gauge roller 7 is rotatably held at its left and right ends by a mounting plate 70 extending rearward from the left and right side plates of the cutting work unit 5 and adjusts the height according to the mounting position of the mounting plate 70 to the side plate.

  The offset mechanism unit 6 that moves the mowing unit 5 to the left and right is connected to the mounting unit 2 so that the front end side is horizontally rotatable and extends rearward, and one end rotates to the mounting unit side. An offset electric cylinder 63 that is horizontally connected to the moving arm 60 side and rotates the rotating arm 60 in the horizontal direction by its extending and contracting operation, and the cutting working unit 5 on the rotating end side of the rotating arm 60. The rotary arm 60 is provided in a pair parallel to the left and right, the front end is on the mounting portion 2 side, and the rear end side is on the cutting work portion holding bracket 64 on the cutting work portion 5 side. Each of them is connected by a front rotation shaft 61 and a rear rotation shaft 62 provided in the vertical direction to form a parallel link, and the cutting work section 5 is located on the side of the tractor shown in FIG. 3 from the rear position of the tractor shown in FIG. ~ side Orthogonal orientation of the cutting work portion against horizontal movement direction of travel be made towards is configured not to change. Since it is composed of an offset mechanism using parallel links, the structure is simple and the manufacturing cost can be reduced.

  The mowing work unit holding bracket 64 is held by a vertical rear rotating shaft 62 on the rotating end side of the rotating arm 60 to form a parallel link mechanism so as to be horizontally rotatable and parallel to the traveling direction. The cutting unit rotating shaft 53 provided horizontally holds the cutting unit 5 so as to be rotatable in the vertical direction on a surface orthogonal to the traveling direction. The mowing unit rotating electric cylinder 54 is connected to the mowing unit 5 side and the mowing unit holding bracket 64 side so that both ends of the mowing unit can be rotated. The working unit 5 can be rotated up and down around the cutting unit rotating shaft 53. By rotating the mowing operation unit 5 up and down, weeds and the like on an inclined surface that is inclined sideways up and down with respect to the traveling surface of the tractor 1 can be mowed.

  The offset mechanism portion 6 is connected to the mounting portion 2 on the front end side through a connection bracket 23 to a lower portion on the left and right sides of the mast frame 22 formed in the portal shape of the mounting portion 2. The rotary arm 60 is held on the rear side by a front rotary shaft 61 provided in the vertical direction, and one end on the front side of the connecting bracket 23 is held by the horizontal vertical rotary shaft 230 orthogonal to the traveling direction. The mast frame 22 is connected to the mast frame 22 so as to be rotatable in the front-rear direction. The front / rear rotation angle is regulated within a certain range, so that the mowing work part 5 can swing back and forth within a certain range with respect to the mounting part 2 and can follow the unevenness of the working field. Yes.

  A lower restricting means 8 for preventing the mounting portion 2 from being lowered too much at the lower portion on one side of the left and right sides of the mast frame 22 formed in the gate shape of the mounting portion 2, which is opposite to the connecting bracket 23 mounting side. The upper end side of the guide shoe 80 formed of a pipe material in an L shape in a side view is attached to a holder 81 formed in the shape of a vertical pipe fixedly provided on the mast frame 22 in the vicinity of the lower link pin 20. The lowering restricting means 8 is configured so as to be inserted and held by a fixing pin, and provided so that the other lower end side is slid on the field scene. Vertical adjustment can be performed by providing an adjustment hole in the guide shoe 80 so that the insertion position of the fixing pin can be changed. In this example, the guide shoe 80 is not provided on the connection bracket 23 side, but it may be provided on the left and right of the mast frame 22, and the lower sliding portion of the guide shoe 80 is a rotating body such as a gauge wheel. You may comprise.

  A gauge roller 7 that stabilizes the cutting height is provided at the lower rear part of the cutting operation unit 5, and the mounting unit 2 is provided with a lowering restricting means 8 that controls the lowering position of the mounting unit 2. The posture in the front-rear direction of the mowing working unit 5 provided between the rear gauge roller 7 and the front lowering restricting means 8 is stabilized.

  FIG. 7 shows a state where the lowering restricting means 8 is not provided. If the mounting portion 2 held by the three-point link mechanism of the tractor 1 is lowered too much, the posture of the cutting work portion 5 is forward as shown in FIG. This causes a disadvantage that the cutting height and cutting performance are affected. In particular, the three-point link mechanism of the tractor tends to descend as the mowing unit 5 moves away from the tractor 1 due to the offset mechanism or the like. It is necessary to maintain the height, but it is necessary to frequently raise and lower the mowing work machine by changing the direction during the work, and it is necessary to adjust the descent position each time, and in the state where it is on the tractor It is difficult to determine the descent position from above, and adjustment is difficult. By providing the descent restriction means 8, it is possible to easily adjust the descent position, improving work efficiency and requiring no skill in mowing machine performance. Can be fully demonstrated.

  Next, the operation of the mowing machine according to the present invention will be described. Mounted on the tractor 1 by the mounting portion 2 provided at the front portion of the mowing working machine, the input shaft 30 of the bevel gear case 3 provided on the side upper portion of the mowing working portion 5 and the tractor PTO shaft are connected by the universal joint 12, It is rotated by the power from the tractor 1. The power of the input shaft 30 is converted by the bevel gear inside the bevel gear case 3 and the rotational power is converted and shifted in the lateral direction of the traveling direction, and the power is transmitted to the side end side by the output shaft 32. An output pulley 40 is fixed to the tip of the output shaft 32 at the side end opposite to the bevel gear case 3, and an input pulley 41 fixed to the end of the rotary shaft 50 of the cutting work unit 5 is provided below the output pulley 40. The power transmitted by the output shaft 32 by the transmission belt 42 that is provided on these pulleys is transmitted to the rotating shaft 50 of the cutting work unit 5 and is driven to rotate. The rotary shaft 50 is provided with a plurality of cutting blades 51 in a swingable manner so that weeds and the like that have been cut pass through the rotary shaft 50 so as to scoop up from the front to the rear, The weeds are cut and crushed by the progress of the tractor. The upper part of the outer periphery of the cutting locus of the cutting blade 51 is covered with the cutting portion cover 52 to prevent scattering of cut weeds and the like, and a part of the cut weeds is rotated by the action of the scooping surface of the cutting blade 51. Bring it around the shaft 50 to crush it further.

  The mowing operation part 5 performs the work by adjusting the offset position from the tractor 1 by moving the offset electric cylinder 63 of the offset mechanism part 6 with respect to the mounting part 2 to move left and right. By cutting the tractor 1 from the tire side of the tractor 1 and moving the tractor 1 on the field surface after cutting the tractor 1, the cutting unit 5 is positioned on the uncut portion and the operation is performed. However, it is possible to prevent occurrence of uncut residue caused by stepping over weeds or the like in an unworked part.

  By offsetting the cutting work part 5 from the side of the tire of the tractor 1 and further extending and retracting the cutting part rotating electric cylinder 54 to rotate the cutting work part 5 up and down in the direction perpendicular to the traveling direction, The mowing work of the slope of the side part inclined up and down with respect to the traveling surface of the tractor 1 becomes possible.

  When the mowing operation part 5 is lowered by the three-point link of the tractor 1 to be in the working state, the mowing work part is lowered by lowering the three-point link to a position where the lower end of the guide shoe 80 of the lowering restricting means 8 is in contact with the field scene. 5 working posture is determined.

  The present invention is used for an agricultural machine for mowing work that is mounted and used behind a traveling machine such as a tractor.

DESCRIPTION OF SYMBOLS 1 Tractor 10 Top link 11 Lower link 12 Universal joint 2 Mounting part 20 Lower link pin 21 Top link pin 22 Mast frame 23 Connection bracket 230 Vertically rotating shaft 3 Bevel gear case 30 Input shaft 31 Bevel gear 32 Output shaft 4 Belt cover 40 Output pulley 41 Input pulley 42 Transmission belt 5 Mowing operation part 50 Rotating shaft 51 Mowing blade 52 Mowing part cover 53 Mowing working part rotating shaft 54 Mowing working part rotating electric cylinder 6 Offset mechanism part 60 Rotating arm 61 Front rotating shaft 62 Rear Rotating shaft 63 Electric cylinder for offset 64 Mowing holder holding bracket 7 Gauge roller 70 Mounting plate 8 Lowering restricting means 80 Guide shoe 81 Holder

Claims (2)

A mounting portion that is mounted on a tractor that is a traveling machine body, an offset mechanism portion that is configured by a parallel link that is provided with a rotation base portion in the mounting portion and is movable in the left-right direction; A cutting work section having a cutting blade that is rotated by the power from, and a gauge roller that stabilizes the cutting height behind the cutting work section,
The said mounting portion located in the working portion forward cutting, down regulating means is provided to one end for preventing the lowering too much mounting portion for regulating the contact with the lowered position of the mounting portion in the field plane, the lowering restriction means Is a lower part of the mounting part so that the vertical position can be adjusted, and the contact part to the farm scene is a guide shoe having a sliding part that can slide the farm scene during work or a gauge ring made of a rotating body. mowing machine features that you have configured. 2. The mowing work machine according to claim 1, wherein the lowering restricting means is provided in the vicinity of the connecting pin of the tractor three-point link mechanism of the mounting portion.

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